C Program to Check Even Number

January 18, 2021 9:10 pm IST

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What are Even Numbers?

An integer (never a fraction) that can be divided exactly by 2. For example, 10 is an even number, i.e., 10 % 2 = 0.

Note: % is a Modulus (Division Remainder) operator, it finds the remainder after division of one number by another. Please check our Arithmetic Operators for more details.

Tips: It is recommended to use our online Even Numbers calculator for better understanding.

Using For Loop

In the following example, we will find all the Even Numbers between 10 and 25 using for loop.

Example

C Compiler

#include <stdio.h> int main() { int start = 10; int end = 25; printf("Even numbers between %d and %d:\n", start, end); for(start=start; start<=end; start++) { if(start % 2 == 0) printf("%d ", start); } return 0; }

Output

Even numbers between 10 and 25: 10 12 14 16 18 20 22 24

Using While Loop

In the following example, we will find all the Even Numbers between 10 and 25 using while loop.

Example

C Compiler

#include <stdio.h> int main() { int start = 10; int end = 25; printf("Even numbers between %d and %d:\n", start, end); while(start <= end) { if(start % 2 == 0) printf("%d ", start); start++; } return 0; }

Output

Even numbers between 10 and 25: 10 12 14 16 18 20 22 24

Using do while Loop

In the following example, we will find all the Even Numbers between 10 and 25 using do while loop.

Example

C Compiler

#include <stdio.h> int main() { int start = 10; int end = 25; printf("Even numbers between %d and %d:\n", start, end); do{ if(start % 2 == 0) printf("%d ", start); start++; }while(start <= end); return 0; }

Output

Even numbers between 10 and 25: 10 12 14 16 18 20 22 24

Even Numbers between any Given Range

In the following example, we will find all the Even numbers between any given range.

Example

C Compiler

#include <stdio.h> int main() { int start, end; printf("Enter a (int) starting number: "); scanf("%d", &start); printf("Enter an (int) ending number: "); scanf("%d", &end); printf("\nEven numbers between %d and %d:\n", start, end); for(start=start; start<=end; start++) { if(start % 2 == 0) printf("%d ", start); } return 0; }

Output

Enter a (int) starting number: 3 Enter an (int) ending number: 11 Even numbers between 3 and 11: 4 6 8 10

Check Whether the Given Number is Even or Odd

In the following example, we will check whether the given number is an Even number or Odd number.

Example

C Compiler

#include <stdio.h> int main() { int num; printf("Enter a (int) number: "); scanf("%d", &num); if(num % 2 == 0) printf("%d is an even number", num); else printf("%d is an odd number", num); return 0; }